Truck tire pump



G. J. SPOHRER.

TRUCK TIRE PUMP. APPLICATION FILED m 21,1920.

1,41 5,725, Patented May 9, 1922.

2 SHEETS-SHEET I.-

Fig.1.

ATTORNEYS G. J. SPOHRER.

TRUCK TIRE PUMP.

APPLICATION FILED :uuz 2f, 1920.

Patented May 9, 1922.

2 SHEETS -SHEET.2.

a \(Z Y xx m e W r z i fl UNITED STATES PATENT (JFFItZE.

GREGORY J. SPOHRER, OF EAST ORANGE, NEW" JERSEY.

TRUCK TIRE PUMP.

Application filed June 21,

I! '0 all to from it may concur-a Be it known that 1 Guneonif J. bmiinnn, a citizen of the United States, and resident of East Orange, in the county of Essex and State of New Jersey. have invented certain new and useful Improvements in Truck Tire Pumps, of which the following a specification.

The invention relates in general to an air compressor or pump of general application a and specifically relates to an improved :form

of compressor and to the mounting of the compressor.

lllore definitely defined the invention r lates to the organization of a pump of the type designed to be nuiunted on the transmission casing of the power plant of an automotive vehicle and operatively connected to be driven from the power plant in such casings for supplying a source of pneumatic power or for inflating tires.

it is generally known that the Society of Automotive Engineers has adopted two standard sized openings in the transmission casing and two definitely dimensioi'ied mounting; pads for mounting accessories thereon which. are intended. to be driven from the available power elements in the transmission casing. These pads have been used heretotore tor the purpose of mounting relatively small capacity tire pumps coupled in difierent ways to one or the other of the gears in the transmission casings. In the case of trucks and other vehicles which use large pneumatic tires, correspondingly large crpacity pumps are commercially necessary so as to reduce, a far as possible, the time element necessary to inflate the large size tire. Ilonm-xver, the designingand the disposition of? any such large size pump has presented engineering ditliculties largely due to lack of available space and to interference 'lrom extensions on the transmission casings well as from other structural parts usually found adjacent the transmission casing in conventional forms of automobile constructions.

It has been suggested in the prior art to provide the pump cylinder element of the compressor with a horizontally extending: su iportinc' ljnacket for engaging one of the mounting pads on the transmission casing and for providing, in etlect, an over-hanging mounting:v for positioning the cylinder element in the available space. This construction was not materially objectionable in the Specification of Letters Patent.

Patented May 9, 1922.

1920. Serial N0. 390,335.

case oi. sniall pumps except iior the massive connecting structure necessary, and for the transmission losrses incidental to the driving: connections but this construction was practically impossible with the advent of large size and necessarily heavy pumps required to inflate the modern large sized tires and for use in supplying air for other operative purposes.

Among other objections to this suggested over-hang construction it may be noted that there is formed a cantilever eilect with a resulting tendency to term a turning; torque which was liable to rip the compressor from its mountingw .l urthen when such a construction was securely mounted on a vehicle travelling at high speed over rough roads, a vibrating movement was set up which racked the mounting construction and re acted on the entire vehicle with disastrous effect.

Accordingly, one of the primary objects of this invention to provide a compressor which may he oli relatively high pumping capacity, which can be mounted directly on the standard forms of mounting pads now prescribed by the automobile engineers and which can he accommor ated in the space available in automobile constructions adjacent the part oi the trans. 'ssion casing" havil'rn the mounting pads.

Broadly, I attain this phase of the invention by torming the conn ressor to fit in the available space directly in front oi either one of the mounting); pads and by connecting the compressor to the pad or pads in such a way as will tend to minimize the distance between the supporting pad and the center of mass oi. the compressor and those reduce the tendency to develop a disruptiiur torque action.

For the purpose oi accommodating a standard unit tor-in Oil compressor to the two sizes of mounting pads referred to" the comn'essor includes an attaching member as an integral part thereof designed to {it the smaller of the pads and also designed to tit a mounting; plate r-oi'1stitutinp; an accessory to the compressor per se and which mount ing plate i designed to fit the larger of the standard mounting pads.

Vhilc the present disclosure features a large capacity pump, space limitations in the situation outlined necessitates the use of a pump which is comparatively undersized for the Work required. Any such pump must therefore be run at high speed to discharge the quantity of air required to meet working demands. Any such excessive work is thus liable to cause overheating unless the generated heat is dissipated as rapidly as it is formed.

Accordingly, another object of the invention is to provide a compressor structure of the type outlined, which will be characterized by features which contribute to a rapid absorption and radiation of the heat generated by the compression of. the air in the piston chamber of the compressor and preferably to attain this result without providmg parts particularly for this purpose.

I attain this phase of the invention by forming the piston cylinder with an integral extension from the heat receiving parts, which extension will provide a relatively large heat dissipating area and at the same time be shaped to provide an enclosing casing for the piston actuating mechanism well as a conduit for a heat conducting liquid leading therefrom to a large heat absorbing part of the complete organization.

Still another object of the invention and particularly featuring economy in construction is to provide a simple form of device of the class outlined which can be easily manufactured with a relatively small amount of material but with the material so proportioned and distributed in a way such as will mutually brace the parts one from the other, and will minimize any tendency to set up internal fatiguing strains.

Various other objects and advantages of the invention will be inpart obvious from an inspection of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features of construction and combination of parts hereiafter set forth and claimed.

In the accompanying drawings Figure l is a view in elevation of the portion ofa transmission casing adjacent the smaller of the standard mounting pads usual in such structures, showing a preferred embodiment of the invention mounted thereon and showing, in ghost lines, the outline of the larger standard mounting pad;

Figure 2 is a vertical sectional view taken centrally axially through a part of the transmission casing and showing part of the cylinder of Figure 1 broken away; and

Figure 3 is a detailed view in side elevation. of the mounting flange of the compressor shown in the preceding figures together with the mounting or adaptlng plate for securing the standard size compressor things to the large size opening and mounting pad shown in ghost lines in Figure 2;

In the following description and in the claims, parts will be identified by specific names for convenience of expression but they are intended to be as generic in their application to similar parts as the art will permit.

In the drawings there is disclosed part of a transmission casing 10 of cmiventional design which is the usual power plant. one of the transmission gears 11 of which is shown in Figure 2 and another of which, nuniberei'l 12, is shown in Figure 3 and both identified hereinafter indil'l'erently as a power element. In the she ving'in Figure l, the wall 13 of the casing is provided with a relatively small sized standard opening 11 i; and in the showing in Figure another wall of the casing is provided with a large sized standard opening in both forms the opening is outlined by a mounting pad l6 provided with four bolt holes l7 in the ease of the small pad or six bolt holes 13 in the case of the large size par At present the Society of Automobile lilllgineers in the United States have adopted for the small or four-hole pads outside dimensions of 43, by 3- inches and for the large or six-hole pad outside dimensions of 6'}: by l;- inches. .Vhile the invention in its illustrated form is inteiuled to meet these dimensional requirements it of course to be understood that the disclosure specifically limited to any one of dimensions and will vary with changes in the recommendations of the designing engimwrs and with changes in practice.

The compressor illustrated follows somewhatalongconventional lines and includes largely a one-pie. integral casing l9 eon1- prising a piston cylinder 20 enlarged at its lowerend to form a mechanism containing casing 21. This casing is provided on one side with a relatively short hollow extension 22 projecting laterally of the axis of the cylinder to face and, to form a continuation of the openings 14 or in the side of the transmission casing. The opening into the casing 21 formed by this erztension is outlinedby an attaching flange 23 apertured to receive securing bolts 24:. The flange l3 constitutes the mounting member of the compressor and is provided on its outer side with a fiat. vertically disposed attaching face 95. It is a feature of this disclosure that this securing flange be of standard to rm on all forms of compressors marketed and that it be fashioned and have its bolt holes positioned to lit over the largest possible available surface on the face of the small size mounting pad as shown in Figure 9. The compressor as a whole is centered in a d vance of the mounting pad and. as particularly shown in Figure l, is symmetrically disposed on opposite sides of a medial plane containing the axis of the cylinder and disis not es shown in Figure 2.

posed perpcndiculur to the plane oi? the attaching face of the nmuutingr pad. The center of mess of the compressor is suhstern tielly at the center of figure so to leetu re :1 compact construction and the center oF mess is positioned relatively close to the supporting pod so as to minimize torque effect due to the necesszufy oiiisct mounting The major portion of the compressor is contnim-ul Within the projected outlines of the mounting pad and this particularly true 'Wltll. relation to the large size pud shown in ghost outline in level. Accordingly the diameter of the upper or cylinder part of the pump disclosed is inede relatively small and is disposed close to the projected. plane of the utteching face 25. On the contrary the mecl'ia n'sni containing}; casing, is projected laterally in word for :1 material distance so :is to house an improved tori-u of piston ectui-ttinp; nieeh enisin 26 and to provide :1 relatively lnrgre heat dissipating element or radiator as here inelter more fully described. The cylinder is provided with it reciprocating p ston 27 including a stem 28 Which guided in the cylinder head 29 end attached by link connections to the actuating mechanism 26. This mechanism is 1. turn d .iven from av rotor); element 30 herein shown to he a gemwheel designed to he cperetively connected :it will t-othe power element '11 by i'nczlns oi? the actuating control handle 31. when it is desired to couple the compressor with the power system of the :nitoinohile.

It is noted in the showii'lg of F' that the power element 11" is poh relatively close to the opening); and is con-- veniently available tor en ,efzigeuient with the adjacent element 30. Til the ease of the sixhole openings, however, the most conveniently erailehle power meinher is positioned some distance inu'erdl :lrom, the corresponding opening and. this necessitates the inter 'iosition oi? e euppleinentol driving connection, such as idle gear 232 to couple the remotely spaced power ele "rent in the transmission musing With the coin eer mechanism i For the purpose o'l mounting the steudurd size compressor on the shohole pod end :it the same time provide the idler geer necessary to complete the power trziusniissiont there is diseloscdin the showing in Figure :5 an attachment which coinpris' i :t mounting plate or edeptingfiangre 33 t shioned to fit the large sizeimcuintingpad and secured thereto by bolts 34. This mounting); plots is provided With apertures which corstunderd pods respond in locutiou to the holt holes in the liunge ol the conipresson end the bolts 52 Which :u'e su iiplied with the compressor may he utilised either to fasten the compressor directly to the purl us shown in l ip'ure 5. or to the uuuiutiup iilete us; shown in Figure The inountiini" phite is provided on its J'Qttl" l'uce wit] :1, puir oi lil'tljlfll'E-E 3'? between which is 'iirotnlly uioui'ited the idler gear Eli! which, when in operative position, meshes with the trui'u-iinisnion go: r l2 end the pump rueelnuiiern ziitiuitingr gear hit it is understood, oi ((Jlll. that the mounting; plate or llun re is provided centrally thereo't with on opening guous on which contains the eonti ports cl goers end R9.

The openings 141; end. if) ere positioned helow the normal level oi the lulu-locating liquid in. the trensniission cosineund the Pltftltl'll oil the several nests in the transmits sion casing end oil the iston ttl'illl'ltttl'flg'IBGClS' nnisn'i so in the casing; ill reset toczinse t-h luliiricuiu; to travel through the conduit pro-- vided hy the two aisiin ll 'liile the piston J=ylinder is dispoeed Wltl'] its axis parallel to the plime oi? the :trcc 25, oh: eclcs i s ed. to

p roj ect i the causing; ill so avoid the dn i; inei ere]. ol'lsettiiue; of the ey niediete singiport,

it is also ohviouely Within the scope of the invention to multiply the number o'l eylin i rs iuehuled in the organization, one sup;- ;ted l'orin eoui irisil ej Lt hehincc strucin which zinoth 1" cylinder is d iiposed line of h the dci laltl end on the op posite side ol. the ct sine .i l opcrzitiou end assuming that the rice is mounted.

it E:

dees shown on either of the and theta it is desired to prosupply of compressed oir tor indetiup; the tires :lior actuating the steri' er or for any other do" Jehle purpose for which n supply oi? h l operuttu: shitln the hen the idc

V in c, direction to othei ol the available the lit nies-iion easing the piston ninnp ectnet- 3 the piston reciproend the cylinder and tedlv tale in chm.

Cl es :u ronn eeteo oi ai or d conduct the some to the pint iei'e the eonipr cl oil is to l ltl'liljj this Mon end o'l' l h ipghl y h eu ted 'rupid punipinn the ronipi ne cylhuler nails to heeooie V and will ettnin ineonvenicut i l? not d \Wal y high temperature unless ineons ere protided to col "luct the heat inpidly tt-WWV troni the cy .der. The in te;;rel COTDSlLIilClTlOH and. relatively large mass oi the combined cylinder and mechal u ueuiil prectice nism containing casing herein disclosed provides a conducting passage for the heat from the points where it is received on the cylinder and a relatively large air cooled exposed radiating surface. The relatively large radiating surface is further subjected to the cooling efiect of moving air in case the vehicle is propelled during the pumping operation. The casting of the cylinder integrally with the mechanism containing casing eliminates any joints therebetween which would otherwise act as heat insulating means and tend to retard the free passage of the heat from the hot to the colder portions of the structure. The integral casting illustrated also features an arrangement in which the heat conducting parts increase in radiating area from the cylinder and thus avoid the insulating eli ect produced by a narrow throat and other connecting parts known heretofore in constructions of this character between the cylinder and the parts connected thereto.

The travelling lubricant acts as a heat conveying medium for transferring the heat from the relatively hot extensions from the cylinder to the relatively cool transmission casing thus taking advantage of the large radiating surface presented by the trans mission casing and the metal parts con nected thereto. While there is, of course, some resistance to the free passage of heat across the a joint between the attaching flange and the mounting pad in the showing in Figure 2 and between the mounting plate and connecting elements in Figure 3 there is nevertheless a material amount of heat transmission from the compressor casing to the transmission casing across this joint, all of which tends to maintain the compressor at a low temperature. Further, the mechanism in the casing 21 tends to splash the lubricant up above its normal level and on to the piston stem and upper relativelyhot parts of the casing.

By means of a device of this character it is possible to provide a relatively small dimensioned compressor for installation on the prescribed form and dimensions of pads on transmission casings and at the same time provide an organization of parts which will rapidly and efficiently provide a large supply of high pressure air and to attain this result without deleterious action upon the pump or its associated parts.

Further, a construction is provided which is relatively light compared to the char acter of work it is required to perform and which can be mounted on vehicles designed for high speed without deleterious effect to the compressor or to the parts carrying the same due to vibratory action of the parts when mounted on a rapidly moving vehicle. The device is capable of being rapidly demounted orassembled and when demounted provides ready access to the interior tor cleaning or replacement.

lVhile I have shown and described, and have pointed out in the annexed claims, certain novel teatures of my invention, it will be understood that various omissions. substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention.

Having thus described my invention, I claim:

1. In a device of the class described, the

combination with a transmission casin provided with a standard opening and with a mounting pad outlining the opening and disposed in a vertical plane, of an air compressor including a mounting member fashioned to fit on said pad and means for sccuring the compressor to the transmission casing so as to be supported thereby ofi'sct laterally outward in relation thereto. the center of mass of said compressor being substantially at the center of figure thereof and positioned within the laterally projected outlines of the pad and relatively close thereto thereby to minimize any tendency of the compressor to turn relative to the mounting pad under the influence oi the torque imposed on the compressor by the cantilever effect of the mounting.

2. In a device oil the class described, the combination of. a transmission casing having a vertically disposed mounting pad and. a transmission gear within the casing adjacent the pad. a compressor including a hollow member coacting with the portion of the casing at the mounting pad to form a pump-actuating-mechanism containing space, actuating mechanism in said space facing the mounting pad, extending therethrough and directly connected to said transmission gear, a piston cylinder carried by said member and having a piston therein operatively connected to be driven by said mechanism and having a reciprocatory movement along the axis of the cylinder which, projected, would pass through said mechanism facing the mounting pad.

3. In a device of the class described, the combination with a casing having a power element therein and having an opening through a vertical side thereof to provide access to said power element, of. a compressor including a mechanism containing housing supported directly from the part of the casing at said opening and including driving mechanism confined with its greatest dimcnsion extending vertically, housed therein and projecting therefrom so as to he opcratively connected to said power element, said compressor also including a cylinder having a piston mounted therein for reciprocatory movement and coupled to said mechanism til) to sing. r

to be actuated thereby, one end of said cylinder being in close juxtaposition t0 the part oithe compressor at the o icninp; thcreloy to minimize the distance between the supporting :aeiug and the adjacent end oi? the piston c linder.

let. u a device oi the class described, the combination with a raising; having a power element therein and having an opening through vertical side thereof to provide access to said power element, ojt an air coinpressor including a mechanism containing; casing and a piston cvlinder 'lorn'ied integral therewith and (l tposcd with its axis passing through the mechanism containing casing, piston driving mechanism in said com- }jiressor adz'tptcd to be driven from said power element and means for demountahly securing' the mechanism containing casing to the first named power clement containing 5.111 a device oi? the class described, the combination with a transmission containing casing having: an opening;- through a vertical wall thereof, a nu)untiiig; pad outlining the opening, and a power element housed. witl'iin the casing adjacci'it said openiiiip', oi a coinpact form oi compressor comprising in effect a inccl'ianisin containing casing: having: relatively \vide horizontal diiiucnsions and a, piston cylinder (Jtllflfilll'li'lilltlglj an integral eatension gn'ojecting theire'trtun and o l i the end of the cylinder opening axially into said mechanism containing}; casing said mocha-- nism containing casinp; provided with a vertic-allyextending openi'n c- :lacing the opening in the trani'imission ca. no; and with an at taching :tlan outlining the opening; for engagi said pad and pi n reciprocating mechanism housed in said relatively wide dimensioned part of the mechanism con taining casing and with pairts projecting through the opening into the transmission casing and actuated from said power element; (inn air compressor including a one piece casting constituting a piston cylinder, a mechanism containing; casing at one end oi the cylinder, said ca ing provided with In -g through a wall thereof, a flat 7 flange outlining said opening and adapted to constitute part of the means for mounting the compressor in place, said casingextending from the plane oi? the attaching flange a distance wter than the distance which the cylinder extends :trorn said plane wherehv the compressor is shaped to lit in and ccoiuunically occupy a prc-deed space piston rcci irocatiua' mecharesin housed in said relatively large mecha" nism containing; casing; and including a rotar i element mounted in the casing and projecting; eivteii'ii'irl v ot the through said opening and adapted to receive power from a source external to the compressor 7; In a device of the class described, the combination with a transmission casing having: one of a series ol dilicrent size mounting pads and a power element within said casing and adjawnt said pad oil? a standard size air compressor adapted to be mounted on the different size mounting pads, iid compressor including; a driven mechanism contained witl'iin its outlines. said eom tn'essor also including attaching; member oi a sine to fit the smallest of said moui'itiiilp pads a Hat plate constitutinpan ace 01W tor accommodating the attroihinc ineinher to a relativel large size mounting pad said plate adapted to tit flat a inst the mounting pad and. provided 'iritl] a bracket projecting from one side thereo'l and adapted to extend into the transmission CilSlllg and an, idler gear carried hy the bracket and constituting a drivino cmincction between the power element in the transmission casino and the driven liator tor the cylinder having a relatively l e heat discharging area.

9.1 .An air compressor, and cooling; means therefor. including a compression cylinder subject to the heat developed under the air com ssion a piston. operating in said cylinder said cylinder having an oil-holdinn; rad lug casing associated therewith and sulnect to the heat developed in said cylinder a container constituting a radii'itor, said container being in tree and open communication with said casing; to afford free How oi oil from said casing to said oil container and return, and operating means for said piston disposed in said casing; and constituting; means to act on the oil in said casino; to repeatedly displace the same and cause flow of the oil from said casing to said radiating container for radiati c; from the container the heat talicn up hy the oil in said casing.

'10. In a device of? the class described, the coinliiination with a transmission casing provided with an opening; in a wall thereof lielow the normal lubricant level, o'l' an air co pro 501 constituting an article of manu- V lIL d'sti c; :troin the transmission casinn; and having a chamber exposed to the v v in the transmission casing thereby ,QIVB lubricant from the casing) said compressor includiup, a piston cylinder which liable to become highly heated and connected to the part tlforming the lubricant containing chamber through means which tend to minimize resistance to heat conduction. I

11. In a device of the class described, the combination with a transmission casing provided with an opening in a vertical wall thereof and containing a power member, of an air compressor having a chamber exposed to the opening in the transmission casing thereby to receive lubricant from the casing, said compressor including a piston cylinder which is liable to become highly heated. and connected to the part forming the lubricant containing" chamber through means which tend to minimize resistance to heat conduction a piston in said piston cylinder and a driving connection between the power member and the piston constituting means for causing the lubricant to circulate through the chamber and transmission casing.

12. In a device of the class described, the combination with a transmission casing having a mounting pad on aside thereof and an opening extending horizontally through the pad, of an air compressor hung from said pad and communicating horizontally through said opening with the interior of the transmission casing, said compressor including a piston cylinder which is liable to become hot, said cylinder having a heat conducting member extending integrally from one end therefrom to form a mechanism containing casing, and means for circulat'ing'a heat conducting liquid through the transmission casing and into contact with said integral extension from the piston cylinder.

13. An air compressor including a onepiece' integral casting of heat conducting material comprising a piston cylinder having an enlargement at one end thereof to form a piston-driving-mechanism-containing-chamber said chamber provided. on one side with a relatively short hollow extension projecting laterally of the axis of the cylinder and an attaching flange outlining the outer end of the extension.

' 14. An air compressor and cooling means therefor, including operating means for the compressor, a casing appurtenant to the compressor, an oil container constituting a radiator and in free and open communication with said casing, said operating means being disposed in part in said casing and in part in the opening establishing communication between said casing and said radiating oil container, said operating means constituting also means to displace the oil in the container to cause a movement of the oil from said casing to said container and return.

15. The combination with a transmission case of an air compressor having a casing associated therewith, said casing and said transmission case being in free communication iior the flow oi: oil from one to the other and return and operating means for the compressor extending into said casing and into said transmission case and constituting a means to displace the oil in said casing to thereby induce a movement of the oil repeatedly to and from the transmission case to constitute the latter a radiator for the heat taken up by the oil from the air compressor and its casing.

16. In a compressing and radiating assemblage, an oil container constituting a radiator. a compressor having a casing appurtenant thereto and adapted to contain oil, said radiator container and said casing being in open communication for the free movement oi oil from one to the other, and return, said assemblage including movable means acting to induce repeated movements of the oil in the casing and container to cause heat developed in the compressor to be conveyed by the oil to the container to be radiated by the latter.

17. The combination oi a transmission case having a standard mounting at one side presenting a pump opening below the usual oil level and a tire pump secured to said mounting and having an operating crank moving in a path beyond the mounting face and into the transmission case to thereby produce improved cooling and in bricating eiilects as well to make possible a large capacity pump in the minimum space.

signed at New York city in the county of New York and State of New York, this 18th day of June, A. D. 1920.

GREGORY J. SPOHRER. 

